A Researcher Has Collected the Following Sample Data $$\begin{array} { l l l l l } 3 & 5 & 12 & 3 & 2\end{array}$$

Multiple Choice

A researcher has collected the following sample data.The mean of the sample is 5. $$\begin{array} { l l l l l } 3 & 5 & 12 & 3 & 2\end{array}$$ The interquartile range is

A) 2.
B) 2.25.
C) 6.
D) 9.